Oxygen reduction reaction at three-phase interfaces

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Ram SubbaramanNenad M Marković

Abstract

The kinetics of the oxygen reduction reaction (ORR) is studied at metal-supporting electrolyte-Nafion three-phase interfaces. We first demonstrate that the sulfonate anions of Nafion are specifically adsorbed on a wide range of surfaces ranging from Pt(hkl) single-crystal surfaces, Pt-poly, Pt-skin [produced on a Pt(3)Ni(111) surface by annealing in ultrahigh vacuum, UHV] to high-surface-area nanostructured thin-film (NSTF) catalysts. The surface coverage by sulfonate and the strength of the Pt-sulfonate interaction are strongly dependent on the geometry and the nature of the Pt surface atoms. Also, they are found to behave analogous to (bi)sulfate anion-specific adsorption on these surfaces, where for the Pt(hkl) surfaces, the trend is Pt(111)>Pt(110)>Pt(100) and for the Pt-skin surface on Pt(3)Ni(111), the interaction strength is found to be Pt-skin<Pt(111). We also found that irrespective of the surface orientation and/or the electronic properties of the surface atoms, the ORR is always inhibited by the presence of ionomers at the electrode surface, confirming that Nafion is not a non-adsorbing electrolyte. Finally, the knowledge gained from studying well-defined Pt(hkl) surfaces is applied to propose that deactivation of th...Continue Reading

References

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Citations

Nov 13, 2012·Nature Materials·Dennis F van der VlietVojislav R Stamenkovic
Aug 7, 2012·Physical Chemistry Chemical Physics : PCCP·L LiY Q Wang
Jun 21, 2011·The Journal of Chemical Physics·G ChiarelloA Politano
Aug 31, 2014·Analytica Chimica Acta·Ana M Gómez-Marín, Juan P Hernández-Ortíz
Nov 5, 2014·The Journal of Chemical Physics·Yoshihisa FuruyaGregory Jerkiewicz
Nov 23, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Jianbo ZengShouzhong Zou
Mar 11, 2016·The Journal of Physical Chemistry Letters·Anusorn Kongkanand, Mark F Mathias
Dec 18, 2013·Physical Chemistry Chemical Physics : PCCP·Ana Ma Gómez-Marín, Juan P Hernández-Ortíz
Apr 14, 2016·Annual Review of Chemical and Biomolecular Engineering·Dongguo LiVojislav R Stamenkovic
Aug 21, 2012·Physical Chemistry Chemical Physics : PCCP·Julien DurstFrédéric Maillard
Jul 5, 2012·ACS Applied Materials & Interfaces·B NarayanamoorthyS Balaji
Feb 13, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Kunal Karan
Oct 1, 2020·Journal of the American Chemical Society·Zeyan LiuYu Huang
Sep 8, 2021·ACS Applied Materials & Interfaces·Anamika ChowdhuryAdam Z Weber

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